<?php
class Palindrome
{
    public static function isPalindrome($word){
        $reverse = '';
        $length = strlen($word);
        $tempLow= strtolower($word);
        for($i=$length-1;$i>=0;$i--){
            $reverse .= $tempLow[$i];
        }

        if($tempLow==$reverse) return true;
        else return false;
    }
}

echo Palindrome::isPalindrome('Deleveled');